You will find all you need here.
http://www.k-mac.com.au/
They will make springs to any height.
A word of warning though. Make sure you tell them you want progressive rate springs and also check the height of the car after the springs are in.
My friend had some springs made up for his s2000. They agreed upon a 37mm drop. When he got the car back it was actually more like 65-70mm. Because he did not mention progressive rate springs they gave him some other shit. It caused some MAJOR problems and now the springs are sitting in some bin somewhere and he is sueing K-mac.